JPH037572B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a vibration device for removing particulate material from a deposit of particulate material.

BACKGROUND ART This type of vibrating device is arranged in a recess or opening provided in a base (for example, on the ground), on which granular material is piled up, and by vibrating the device, the deposited material is removed. The material is fed at a controlled rate into a conveyor system below for transport to the point of use.

BACKGROUND OF THE INVENTION Removal devices for removing particulate material from particulate material deposits have been in use for some time and are typically used in conjunction with power plants and other coal-burning equipment. In such locations, an opening is provided in the ground leading to a tunnel connected to a furnace or other coal-burning equipment, and a large pile of coal is dumped into the opening. A cylindrical hopper is placed in the opening below the pile and is capable of being vibrated to convey material, ie coal, from the pile into the feeding device. The feeder feeds the received material at a controlled rate to a conveyor, such as a belt, connected to its outlet, which conveys the received coal at a predetermined rate to a furnace or other point of use. Although the feeding device in this system is always in operation, the hopper is operated at time intervals and is inactive at other times. This is because the hopper feed rate typically far exceeds the feeder requirements. If the material left behind without being discharged from the hopper is kept as it is and the hopper is constantly vibrated, the material will be compacted and cause a bridging phenomenon (granules form an arch near the hopper exit and block the exit). cause)
This will stop the flow of material.

Applicant's U.S. Patent No. 4131193
The device disclosed in No. 5,621,673 (corresponding to No. 5,621,673) eliminates the need for a hopper and exhibits an excellent function as a device for taking out granular material from the deposit. The device of that patent includes an adjustable extension member attached to a baffle plate to adjust the flow of material by controlling the angle of repose of the granular material when the vibration mechanism is not activated. It was hot.

However, in the device of the same patent, the flow rate of the material is adjusted by adjusting the degree of protrusion of the extension member with respect to the deflector plate, but the degree of protrusion of the extension member can be adjusted by operating the device. pause,
Any particulate material on the baffle plate must be evacuated and cleaned so that the extension member can be moved. This is because, once the vibrating device is operated under a deposit of particulate material such as coal, the coal will always remain deposited on the upper surface of the baffle plate even when the vibrating device is stopped.

In addition, in the apparatus of the above-mentioned patent, in order to process certain types of granular materials, the deflector plate should be made as narrow as possible so as to widely open the flow passages on the outside of the side edges of the first and second portions of the deflector plate. may be advantageous. However, wide open channels outside the side edges of the baffle plate may allow material to continue to flow from the stack to the conveyor below, even when the oscillator is stopped. That is, with the inner end of the line of the material's angle of repose relative to the horizontal extending into the central opening, material may continue to flow to the conveyor even when the oscillator is stopped.

OBJECTS OF THE INVENTION It is an object of the present invention to overcome the above-mentioned drawbacks associated with the vibration device of US Pat. No. 4,131,193.

OBJECTS OF THE INVENTION It is therefore an object of the present invention to provide a vibratory device for feeding particulate material with an improved mechanism for adjusting the feeding rate of the particulate material.

Means for Solving the Problems In order to achieve the above object, the present invention provides a vibrating device for feeding granular material, which is adapted to be used in combination with a base having an opening communicating with a passageway below. a trough with an opening extending from one end to the other end of the trough, the trough having end walls at both ends thereof and sloping downwardly and inwardly from a side of the trough to the opening; extending side walls, each side wall having an elongated edge member defining a portion of the opening, and a baffle plate fixed to each end wall of the trough and extending upwardly from the trough; The vibrating device is configured such that the lower edge of the plate is spaced from the side walls of the trough and the central portion of the baffle plate is located above the opening of the trough to support material deposited on the vibrating device. mounting means for mounting the trough in the opening of the base, the mounting means including a spring for supporting the trough so that it can vibrate, and the vibration device being mounted in the longitudinal direction of the opening of the trough. an oscillator for transversely vibrating the trough; a conveyor for receiving material discharged through the trough opening; and a conveyor for receiving material discharged through the trough opening; Flow control means for controlling the flow is provided, the flow control means comprising gates extending longitudinally adjacent to both edges of the opening, and downwardly extending from the upper edge of each gate adjacent to the baffle plate. attachment means for adjustably attaching each gate to the edge of the trough opening adjacent thereto in order to adapt the angle with respect to the horizontal of a straight line extending to the edge to the angle of repose at rest of the granular material; Provided is a vibration device characterized by comprising:

Effects and Effects According to the present invention, adjustable gates are provided on both sides of the trough opening as a flow control means for controlling the flow of granular material flowing down through the trough opening. By adjustment, the angle of the straight line extending from the upper edge of the gate to the lower edge of the baffle plate adjacent thereto with respect to the horizontal can be adapted to the angle of repose of the granular material at rest. Thereby, the gate can be made to prevent the free flow of particulate material when the oscillator is stopped.

Further, the gate is adjusted so that the angle of a straight line extending from the upper edge of the gate to the lower edge of the baffle plate adjacent to the gate with respect to the horizontal is smaller than, but close to, the angle of repose of the granular material when it is at rest. so that when the oscillator of the vibrating device is started, the material immediately begins to flow and continues to flow at the desired flow rate. According to the invention, therefore, when the vibration device (oscillator) is stopped, the material feed is also stopped, and when the vibration device is started again, the material feed is immediately resumed.

Of course, along with adjusting the oscillator of the vibrating device, the flow rate of particulate material flowing down through the opening of the trough can be controlled by adjusting the gate. Thereby, it is possible to prevent a phenomenon in which the pressure of the material pile applied to the vibrating device (supply device) increases and the granular material is compacted and the flow is obstructed. Also, if desired, the vibrating device (feeding device) can be operated continuously for a relatively long period of time;
so as to avoid material bridging or blockage phenomena,
The feed rate of the material from the material pile to the conveyor below the vibratory device can be adjusted to achieve efficient delivery of the particulate material to its final use site.

According to the arrangement of the invention, the adjustment of the gate can be easily carried out without the need to remove material while the material remains deposited on the trough and baffle plate of the vibrating device, as is clear from FIG. . Adjustment of the gate can be carried out smoothly while the material remains deposited on the trough and baffle plate of the vibrator, and only a small amount of material spills out when the gate is adjusted in the downward direction. Therefore, in order to adjust the degree of protrusion of the extension member relative to the baffle plate, as in the device of the above-mentioned U.S. Pat. No. 4,131,193, the vibration device is deactivated;
Significant time and cost savings can be achieved compared to having to eject and clean all the particulate material on the baffle plate.

Referring to the embodiment of the invention shown in FIGS. 1 and 2, the vibrating device 1 is adapted to be mounted directly below the large opening 11 in the base 12.
0 is shown. In practice, the base 12 is formed by a concrete top wall 13 forming part of a tunnel or passageway 14 below the opening 11 . Typically, the upper surface of the base 12 is at ground level and the opening 11 is located directly below the drop-off location for the granular material to be conveyed. In a typical installation, the material is coal that has been pulverized to a relatively small size, and an elevated railway track is laid above the opening 11, and the coal is dropped down from a freight car loaded with coal. forming a deposit of coal on the base 12. Vibration device 1 installed inside opening 11
0 is a rectangular (preferably square) trough 15
has. The trough 15 has a side wall 1 sloping downward to a central opening 18 extending over its entire length.
6, 17, upright end walls 19, 20, and an upright central wall 21.

A baffle plate 22 is provided over the central opening 18 of the trough. The baffle plate 22 has a first plate extending arcuately downward from its central portion toward the side wall 17 of the trough.
part 22a and also from the central part the side wall 1 of the trough.
a second portion 22 extending arcuately downward toward 6;
It consists of b. The highest portion of the baffle plate is spaced above the central opening 18 of the trough.

The trough 15 is secured to beams 25, 26 extending along both sides thereof. Beams 25 and 26 are
It is supported on vibration isolation springs 27 carried on struts 28 supported on the floor 29 of the tunnel 14.

A spring 30 for imparting vibration to the trough 15
An oscillator 30 is fixed to the beam 26 via a and 30b. Preferably, the oscillator 30 is of the type disclosed in commonly assigned US Pat. No. 3,358,815, which allows the amplitude of vibration to be varied to vary the ejection rate of particulate material.

Material discharged from the trough 15 through its central opening 18 falls onto a conveyor belt 33 running through the tunnel 14 on idler rollers 34 . Referenced 35 is the return run of the conveyor belt.

A pair of vertical plates 31 forming both sides of the opening 11
Dust-proof sealing members 36, 37 are provided between the top surfaces of the beams 25, 26 and the top surfaces of the beams 25, 26. Similarly, dustproof sealing members 38 and 39 are also provided between the bottom of the trough 15 and both side edges of the conveyor 33.

The material builds up on the trough 15 and eventually forms a large pile on the base 12, completely covering the opening 11. In that case, the material stops between the side edges 24a, 24b of the baffle plate 22 and the upper surface of the adjacent side walls 16, 17 of the trough and is then deposited thereon. In this condition, if the trough is stationary, no material will be fed through the opening 18 onto the conveyor 33.

When the oscillator 30 is started, vibrations are imparted to the trough 15, and the material supported by the trough and deposited on the aperture 11 is moved to the side edges 24 of the baffle plate.
It is fed onto the conveyor 33 through the gap between a, 24b and the side walls 16, 17 of the trough. Conveyor 33 then transports the material to its final use location.

The angle of repose or rest of a particulate material depends on the nature of the material. Some materials can be deposited relatively high (large angle of repose), while others cannot be deposited very high. If material continues to be deposited after reaching the angle of repose, the material pile collapses and the diameter at the bottom of the pile increases, keeping the angle of repose constant. When a pile of material is vibrated, its angle of repose becomes significantly smaller. The structure and operation of the device described above is substantially similar to that described in our US Pat. No. 4,131,193.

In the apparatus of the above-mentioned patent, in order to process certain types of particulate materials, the deflector plate 22 is moved so that the flow path outside the side edges 24a, 24b of the first portion 22a and second portion 22b of the deflector plate 22 is wide open. It has been found to be advantageous to make . However, if the flow path outside the side edges of the baffle plate 22 is wide open, material may continue to flow from the stack to the conveyor 33 even when the oscillator 30 is stopped. That is, in a state where the inner end of the line of repose angle α of the material with respect to the horizontal line (see FIG. 4) extends to the central opening 18, even if the oscillator is stopped,
Material may continue to flow to conveyor 33. To control the flow of material when the oscillator 30 is stopped, adjustable gates 50 are inserted into the side walls 16 on either side of the central opening 18 to intersect the angle of repose of the particulate material and prevent free flow of material. Install it on 17. Specifically, the opposite edges of the rectangular central opening 18 are defined by depending flanges or edge members 51 of chevron members 52 welded to the lower surfaces of the inner edges of the side walls 16, 17 of the trough 15, respectively. The depending flange 51 is provided with a plurality of elongated slots 54 parallel to each other and spaced apart along the length of the flange. Each gate 50 is secured to the flange 51 by a plurality of laterally projecting stand bolts 56 which are secured to the gate and which extend through slots 54 in the flange 51. By screwing the nut 58 onto the bolt 56 and tightening it, the gate 50 is closed.
are locked to the corresponding trough side walls 16, 17, respectively. The upper edge 60 of each gate can be adjusted in the vertical direction by loosening the nuts 58, moving the gates 50 up and down, and tightening the nuts again.

As is well known, each particulate material has its own angle of repose in its resting state, as indicated by α in FIG. Gate 50 in FIG.
Otherwise, the line 62 representing the angle of repose of the material would extend beyond the edge of the central aperture 18, and the material would be at least partially onto the conveyor 33, as described in the above-mentioned US patent. It continues to flow down. Such flow is particularly likely when the width of the baffle plate 22 is reduced to a desired minimum. In accordance with the invention, adjustable gates 50 are disposed on both sides of the central opening 18, and the gates are arranged at the upper edges 6 of the central opening 18.
0 is located above the line 62 defining the angle of repose α of the material.
Gate 50 prevents the flow of material when zero is stopped. When the oscillator 30 is started, the angle of repose of the material decreases and the material
0 and flows down onto the conveyor 33.

Adjustment of the gate 50 is simple and can be done without the need to remove any deposits built up on top of the device. That is, loosen the nut 58 and open the gate 5.
0 up and down relative to the trough 15 and tighten the nut again. The upper edge 60 of the gate 50 is
It is positioned so that a line 66 drawn from the edge to the side edges 24a, 24b of the baffle plate 22 defines an angle that is less than the angle of repose of the material to be treated relative to the horizontal at rest. At rest, the top surface of the material coincides with the material's angle of repose α. The angle B of the line 66 drawn from the side edge of the baffle plate to the upper edge 60 of the gate 50 is less than the angle of repose α, so no material flows. When the vibration device 10 is actuated, the angle of the upper surface of the material is smaller than the angle B, and the material passes through the gate 5.
0 over the upper edge 60 and onto the conveyor 33.

One feature of this vibrating device is that the direction of vibration is horizontal and perpendicular to the longitudinal axis of the trough 15, so that each inclined side wall 16, 17 acts as a vibratory feed member, displacing the material on the trough. Feed toward the proximal edge of the opening 18.

Also, when the vibrating device 10 is activated, its vibratory force is transmitted into the material deposit 42 on the aperture 11. The primary vibratory force is along the line of arrow 43 which is approximately parallel to the internal deflection or bending angle of the material, which internal deflection angle is approximately parallel to the material's angle of repose.
Thus, starting the vibrator will cause collapse of the material pile, and stopping the vibrator will stop the flow of material.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the vibration device of the present invention, FIG. 2 is a longitudinal cross-sectional view taken along line 2-2 in FIG. 1, and FIG. 3 is a deflection plate forming a part of the device in FIG. FIG. 4 is a cross-sectional view similar to FIG. 2, but showing the apparatus at rest and material being deposited. FIG. 5 is a view similar to FIG. 4, but showing the device in operation. 10: Vibration device, 11: Opening, 12: Base,
14: Tunnel (passage), 15: Trough, 16,
17: Side wall, 18: Central opening, 19, 20: End wall, 22, 42: Deflector plate, 24a, 24b: Side edge, 25, 26: Beam, 27: Spring, 30: Oscillator, 33: Conveyor belt, 50 :Gate, 5
2: angle member, 54: slot, 56: bolt,
58: Natsuto.

Claims (1)

[Scope of Claims] 1. A vibrating device for feeding granular material adapted to be used in combination with a base having an opening communicating with a passageway below, the vibration device extending from one end of the base to the other. A trough with an opening is provided, the trough having end walls at opposite ends thereof and side walls extending downwardly and inwardly from the sides of the trough to the opening, each side wall having a a baffle plate having an elongated edge member defining a portion of the opening and fixed to opposite end walls of the trough and extending upwardly from the trough, the lower edge of the baffle being spaced from the side walls of the trough; , a central portion of the baffle plate is positioned above the opening of the trough, and mounting for mounting the vibrating device within the opening of the base so as to be able to support material deposited on the vibrating device; means are provided, the mounting means including a spring for vibratingly supporting the trough, and an oscillator for vibrating the vibrator in a direction transverse to the longitudinal direction of the opening of the trough. a conveyor fixed to a vibrating device and disposed below the opening for receiving material discharged through the opening of the trough, and flow control means for controlling the flow of particulate material into the opening of the trough; The flow control means includes gates extending longitudinally adjacent opposite sides of the opening;
In order to match the angle with the horizontal of a straight line extending from the upper edge of each gate to the lower edge of the adjacent baffle plate to the angle of repose of the granular material at rest, each gate is connected to the trough adjacent to it. and mounting means for adjustable adjustment to the edge of the opening.